This movie is based on one of the novels by Polish science-fiction writer Stanislaw Lem. The novel's title is "Astronauci" (The Astonauts) and was written in 1951. Because of its heavy socialist realists overtone, Lem in his late years forbade the publishing houses to publish this book again.
The movie is about a mysterious magnetic spool found during a construction project is discovered to have originated from Venus. A rocket expedition to Venus is launched to discover the origin of the spool and the race that created it.
First Spaceship on Venus (1960 - Color):
In 1970, debris from the 1908 Tunguska "meteor" are found which turn out to be recordings from a spaceship crashed there. The ship's origin is determined to be Venus, and an international team sets out with their spaceship "Kosmokrator" to visit the "Silent Planet", which is shrouded in clouds, and doesn't respond to contact attempts. While the "Kosmokrator" is in flight, the record is decoded and it turns out that the Venusians seemingly planned to invade Earth in 1908. Should the "Kosmokrator" still attempt to get in touch with the Aliens? And why are they silent now?